> For the complete documentation index, see [llms.txt](https://senselab.gitbook.io/senselab-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://senselab.gitbook.io/senselab-docs/vendor/doctrine/lexer/upgrade.md).

# UPGRADE

Note about upgrading: Doctrine uses static and runtime mechanisms to raise awareness about deprecated code.

* Use of `@deprecated` docblock that is detected by IDEs (like PHPStorm) or Static Analysis tools (like Psalm, phpstan)
* Use of our low-overhead runtime deprecation API, details: <https://github.com/doctrine/deprecations/>

## Upgrade to 3.0.0

`Doctrine\Common\Lexer\Token` no longer implements `ArrayAccess`. Parameter type declarations have been added to `Doctrine\Common\Lexer\AbstractLexer` and `Doctrine\Common\Lexer\Token`. You should add both parameter type declarations and return type declarations to your lexers, based on the `@return` phpdoc.

## Upgrade to 2.0.0

`AbstractLexer::glimpse()` and `AbstractLexer::peek()` now return instances of `Doctrine\Common\Lexer\Token`, which is an array-like class Using it as an array is deprecated in favor of using properties of that class. Using `count()` on it is deprecated with no replacement.


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